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C 29-C 29M-97 - Bulk Density (Unit Weight) and Voids in Ag

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Bulk Density (Unit Weight) and Voids in Aggregate
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  ~~1~Designation:C940 - 98a Standard TestMethodforExpansionandBleedingofFreshlyMixedGroutsfor Preplaced-AggregateConcreteintheLaboratory 1 ThisstandardisissuedunderthefixeddesignationC940;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon e)indicatesaneditorialchangesincethelastrevisionorreapproval. 1.Scope1.1Thistestmethoddeterminestheamountofexpansionandaccumulationofbleedwateratthesurfaceoffreshlymixedhydraulic-cementgroutusedintheproductionofpreplaced-aggregate PA)concrete.1.2Itisforusewithcementgroutwhetherornotitincludesfineaggregateormineraladmixturesorboth.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.1.4 Thisstandardmay involvehazardousmaterials opera tions andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns ifany associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter m n theapplicabilityofregulatorylimitationspriortouse. 2.ReferencedDocuments2.1 ASTMStandards: C125TerminologyRelatingtoConcreteandConcreteAggregates2C937SpecificationforGroutFluidifierforPreplaced-AggregateConcrete23.Terminology3.1 DefinitionofTerms Terms usedinthistestmethodaredefinedinTerminologyC125orinthissection.3.1.1 expansion increase inthevolumeofagrout,ex-pressedasapercentageoftheoriginalvolumeofthegrout.3.1.2 bleeding This termisdefinedasstatedinTerminol-ogyC125,withtheexceptionthatitpertainstogroutinthistestmethod.4.SummaryofTestMethod4.1Groutisplacedinagraduatedcylinder.Changesintotalvolumeandaccumulationofbleedwater,ifany,onthesurfaceofthegroutareobservedoveraperiodoftime. I ThistestmethodisunderthejurisdictionofASTMCommitteeC-9onConcrete andConcreteAggregatesandisthedirectresponsibilityofSubeommitteeC09.41onConcreteforRadiationShielding.CurrenteditionapprovedMay10,1998.PublishedDecember1998.OriginallypublishedasC940-81.LastpreviouseditionC940 -98. 2 AnnualBookofASTMStandards Vol04.02. Copyright@ASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959,UnitedStales. 5.SignificanceandUse5.1ThismethodisusefulfordeterminingtheexpansionandbleedingcharacteristicsoffreshlymixedfluidgroutusedinPAconcrete.   6.Interferences6.1Failuretoobtainauniformlysmoothmixture,freeoflumps,willcauseexcessivebleedingandmayresultinreducedexpansion.6.2Thecapabilityofmostadmixturestoproduceexpansionandthetendencytobleedisrelatedtothetemperatureofthegroutduringtheperiodoftest.7.Apparatus7.1 GlassGraduate 1000mL,readingto10mL.7.2 GlassGraduate 25mL,readingto1mL.7.3 Thermometer accuratetoO.5°C 1°F)formeasuringgroutandairtemperature.8.TestSample8.1Thegrouttestsampleshallconsistofapproximately1500mLandshallberepresentativeofthegroutinthemixer.9.Procedure9.1Whensamplingandtestingarebeingperformedinthelaboratoryforthepurposeofdesigningorcomparingmixturesorforqualifyingadmixturesincludinggroutfluidifiersproceedinthefollowingmanner:9.1.1Maintaintheambienttemperatureoftheroominwhichthetestisperformedat23.0:t2°C 73.4:t3°F),unlessotherwisespecified.9.1.2Bringthetemperatureofalldrymaterialsandmixingwatertoaconstanttemperatureof23.0:t2°C 73.4:t3°F)beforemixing,unlessotherwisespecified.9.1.3Startvolumemeasurementswithin3minofcomple-tionofmixing.9.2Whensamplingandtestingarebeingperformedinthefield,recordthetemperatureofthegroutsampleandtheambienttemperatureoftheareainwhichthetestreadingsaremade.Recordthetimeintervalbetweencompletionofmixingandstartoftest.9.3Immediatelyafterthecompletionofmixing,measure thetemperatureofthegrout.Thenintroducethegroutinto a FINCO PVT LIMITED ENGINEERINGS LESDIRE TOR TE 291 ModeraStreet.Colombo01500 SriLanka.Tel:94112546052 5 2522101 4714940 4714360Fax:94112546056E Mail:esd@fincoesd.com eb:www.fincoesd.com  4ffi~ C940 lOCO-mLgraduatedcylinderuntilthevolumeofthesampleis80C::;:10mL.Recordthevolumeofthesampleandthetimeat ,hichthereadingwasmade.Placethegraduatedcylinderonalevelsurfacefreeofvibration.Covertopreventevaporationofthebleedwater.9.4Takeandrecordthereadings,estimatedtothenearestImL,oftheuppersurfacesofthegroutandbleedwater,ifany,ofthesampleinthegraduateat15-minintervalsforthefirst60minandthereafterathourlyintervalsuntiltwosuccessivereadingsshownofurtherexpansionorbleeding.WhenthetestforexpansionandbleedingisusedinconnectionwithSpeci-ficationC937,itshallbediscontinued3haftertheinitialreading.9.5Attheconclusionofthetest,decantthebleedwaterintoa25-mLgraduatebytiltingthespecimenanddrawingthewateroffwithapipetorlargemedicinedropper.Recordthe finalvolumeofbleedwatertothenearest0.5mL. . 10.Calculation10.1Calculatetheexpansionofthegrout,anditsbleedingandthecombinedexpansionofgroutplusbleedwateraspercentagesoftheinitialvolumeofthegrout,asfollows: v-vExpansion =y X 100 V-VBleeding =yXIOOatprescribedintervalsIV2-VICombinedExpansion =--v;-xl00VFinalbleeding = VWX100I where: VI =volumeofsampleatbeginningoftest,mL, V2 =volumeofsampleatprescribedintervals,measuredatuppersurfaceofwaterlayer,mL, Vg =volumeofgroutportionofsampleatprescribedintervals,atuppersurfaceofgrout,mL,and Vw =volumeofdecantedbleedwater,mL.11.Repll~-t11.1Thereportshallincludethefollowing:11.1.1Identificationofthegroutsample.11.1.2Expansionofgrouttothenearest0.2 foreachprescribedinterval.11.1.3Bleedingofgrouttothenearest0.2 foreachprescribedinterval.11.1.4Combinedexpansionofgroutplusbleedwatertothenearest0.2 foreachprescribedinterval.ILLSFinalbleedingtonearest0.2 .11.1.6Temperatureofgroutsampleatstartoftest.11.1.7Ambienttemperatureoflaboratoryortestingareaatthebeginningandendoftest.12.PrecisionandBias12.1 Precision: 12.1.1 Bleeding-The singlelaboratory,threeoperators,standarddeviationhasbeenfoundtobe0.06 .Therefore,resultsfromtwoproperlyconductedtests(bythesameoperator)onthesamematerialshouldnotdifferbymorethan0.17 .12.1.2 CombinedExpansion-The singlelaboratory,threeoperators,standarddeviationhasbeenfoundtobe0.37 .Therefore,resultsfromtwoproperlyconductedtests(bythesameoperator)onthesamematerialshouldnotdifferbymorethan1.04 .12.2 Bias-No statementsonbiascanbepreparedbecausetherearenostandardreferencematerials.13.Keywords13.1bleeding;concrete;expansion;grouts;preplaced-aggregate;preplaced-aggregateconcrete TheAmericanSocietyforTestingandMaterialstakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstandard.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtheriskofinfringementofsuchrights,areentirelytheirownresponsibility.Thisstandardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteeandmustbereviewedeveryfiveyearsandifnotrevised,eitherreapprovedorwithdrawn.Yourcommentsareinvitedeitherforrevisionofthisstandardorforadditionalstandardsandshouldbeaddressedto  ST Headquarters.Yourcommentswillreceivecarefulconsiderationat a meetingoftheresponsibletechnicalcommittee,whichyoumayattend.  you feelthatyourcommentshavenotreceived a fairhearingyoushouldmakeyourviewsknowntotheASTMCommittee on Standards.attheaddressshownbelow.ThisstandardiscopyrightedbyASTM,100BarrHarborDrive, POBoxClOD WestConshohocken,PA 19428-2959, UnitedStates.Individualreprints  single ormultiplecopies ofthisstandardmaybeobtained by contactingASTMatthe above addressorat610-832-9585 phone ,610-832-9555 fax ,orservice@astm.org e-mail ;orthroughtheASTMwebsite www.astm.org . FINCO PVT)LIMITED ENGINEERINGSALESDIRECTORATE 291 ModeraStreet.Colombo  15 SriLanka.Tel:94112546052 5 2522101 4714940 4714360Fax:94112546056E Mail:esd@fincoesd.com eb:www fincoesdcom 2
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